Bulk Youtube Unsubscribe code

var i = 0;
var els = document.getElementById("contents").querySelectorAll('.ytd-subscribe-button-renderer[subscribed]')
var myVar = setInterval(unscribe, 1000);
function unscribe () {
    console.log("working with", i);
    if (i < els.length) {
        els[i].querySelector('.ytd-subscribe-button-renderer').click();
        setTimeout(function () {
            var unSubBtn = document.getElementById("confirm-button").click();
            delete els[i];
        }, 550);
    }
    i++;
    console.log(i + " unsubscribed");
    console.log(els.length + " remaining");
}